[TUHS] fmt(1): history, POSIX, -t, -c

Clem Cole clemc at ccc.com
Thu May 28 23:30:09 AEST 2020


fmt was originally written by Kurt Shoens at UCB when he worked in Mail and
delivermail.


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[ctcole-mac09:bsd-sources/usr.bin/fmt] ctcole% wc -l *uu
129 fmt.tar.bz2.uu
[ctcole-mac09:bsd-sources/usr.bin/fmt] ctcole% clear
[ctcole-mac09:bsd-sources/usr.bin/fmt] ctcole% cat *uu
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end

On Thu, May 28, 2020 at 8:41 AM markus schnalke <meillo at marmaro.de> wrote:

> Hoi,
>
> personally I use fmt(1) a lot for email formatting and such.
> Typically I only use the `-w' parameter. Now someone asked me about
> `-t' and `-c' of *GNU* fmt(1). I wasn't able to find good documentation
> on them. The manpage only tells that they have to do with different
> indentation for the first or first two lines. But what are the use
> cases? How would source text for these parameters look like?
>
> A look into the description and rationale sections of POSIX, which
> often provides helpful information, was not possible because fmt(1)
> is not part of POSIX (only fold(1) is). Why's that? Is it because
> fmt(1) differs so much between Unix implementations? On BSD `-c'
> centers text and `-t' sets tab widths. Plan 9 has none of these
> options. But still, `-w' could have been standardized. Or was the
> line filling algorithm different as well? How does fold(1) fit into
> the picture?
>
> Maybe you can answer some of these questions or give hints on where
> I could find answers myself.
>
>
> meillo
>
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